JPWO2014041938A1 - Information input device - Google Patents

Abstract

An object of the present invention is to provide an information input device that can detect the information input to the input image by tracking the detection target and changing the projection position of the input image. Input a projection unit that projects an input image, a projection position change unit that changes a projection position of the input image, a detection sensor that detects the position of the user's foot, and a position of the user's foot that is detected by the detection sensor An information input device comprising: a control unit that controls the projection position changing unit so that the image for use in tracking is detected, and that an input operation by a user's foot is determined to detect information input through the input image.

Description

  The present invention relates to an information input device, and more particularly to an information input device using a projected input image.

  For example, an information input device such as a remote controller is generally used to input information for operating a television, a video, or the like. However, when trying to use it, there is a problem that the place where the remote controller or the like is placed is unknown, and when it is desired to use it, it cannot be used.

  Therefore, there has been a demand for an information input device that is simple and easy to understand and can be operated intuitively by the majority of people without operating the information input device itself.

  By the way, an image showing an operation unit having a plurality of input keys is projected from the image projection device, and the movement of a finger on the image is detected by image recognition processing, and information input for determining that the input key has been pressed is input. An apparatus is known (see, for example, Patent Document 1).

  In Patent Document 1, the movement of a finger on an image is determined by detecting the finger from the image read by the imaging unit by edge detection and then moving from the top to the bottom of the finger, that is, the finger on the surface on which the image is projected. Detecting contact.

  In addition, when the user wears the projector, receives the dial pad projected by the projector with the palm of the hand, and points the dial pad projected on the palm with an instrument attached to the fingertip of the user, the corresponding dial pad is supported. A wearable gesture interface for inputting is known (see, for example, Patent Document 2).

  In the gesture interface described in Patent Document 2, the computer analyzes the image captured by the camera, tracks the movement of the instrument attached to the user's fingertip, and determines whether there is an input corresponding to the dial pad. Has been. Further, since the image from the projector is projected after being reflected by the mirror, the projection location can be changed by the user manually changing the position of the mirror.

  Furthermore, a system is known in which a palm is detected within a predetermined region where an image can be projected, and the contents of stars, haiku, and a pictorial book are projected onto the detected palm (see, for example, Non-Patent Document 1). In the system described in Non-Patent Document 1, the projection direction of the projector is fixed, but since the projection is always performed on the entire predetermined area, the image is displayed only on the detected palm portion. .

  Furthermore, there is known an electronic music stand that enables an instruction to turn a musical score with a pedal on a display panel on which a musical score is displayed (for example, Patent Document 3). In the system described in Patent Document 3, an instruction to turn a musical score is given by an actual pedal connected to an electronic music stand with a cable.

JP-A-11-95895 (FIG. 1) US Publication No. 2010/0199232 (FIG. 12) Japanese Patent Laying-Open No. 2008-292966 (FIG. 1)

"Palm interface: Personal information presentation system in public space using image processing", Transactions of Information Processing Society of Japan, vol. 49, no. 7 2528-2538, July 2008

  However, if the movement of the finger is determined by detecting the edge of the video, an object other than a human finger is mistakenly recognized as a finger, or the object that is held when the object is held is mistaken as a finger. There was a problem of recognizing or doing.

  Further, the gesture interface described in Patent Document 2 has a problem that the user has to wear a device including a projector and the like, and the operation is troublesome as compared with a normal remote control.

  Furthermore, in the gesture interface described in Patent Document 2, since the projector is fixed, the projection position can be manually changed by a mirror. However, if the palm is not held at the projection position, the dial pad is placed on the palm. There was also a problem that it could not be projected.

  In the system described in Non-Patent Document 1, since the projection direction of the projector is fixed, in order to display an image on the detected palm, a large projector capable of projecting the entire predetermined area must be used. I had to.

  Further, in the system described in Patent Document 3, since the pedal for performing the input instruction is connected to the main body of the electronic music stand with a cable, the cable gets in the way or the user moves away from the pedal. There is a problem that it becomes difficult to give an input instruction.

  Accordingly, an object of the present invention is to provide an information input device that can solve the above-described problems.

  In addition, the present invention provides an information input device that can track the user's foot, change the projection position of the input image, and detect information input to the input image by the user's foot. Objective.

  It is another object of the present invention to provide an information input device that can track the position of a user's foot and display an input image in the vicinity of the user's foot.

  It is another object of the present invention to provide an information input device that enables an input operation using a user's foot without wearing a specific device.

  The information input device includes a projection unit that projects an input image, a projection position change unit that changes a projection position of the input image, a detection sensor that detects a position of a user's foot, and a user's detected by the detection sensor. And a control unit that controls the projection position changing unit so that the input image tracks the position of the foot, and that determines an input operation by the user's foot and detects information input by the input image. To do.

  In the information input device, the detection sensor includes a depth sensor, and the control unit calculates the distance from the projection surface onto which the input image is projected to the user's foot based on the depth data from the depth sensor. It is preferable to determine the input operation by the user's foot based on the determined distance.

  In the above information input device, it is preferable that the control unit detects a tap by the user's foot based on the distance and determines whether or not an input operation has been performed.

  In the information input device, it is preferable that the control unit detects an information input by the input image when it is determined that an input operation with the user's foot is performed on the projected input screen.

  In the above information input device, it is preferable that the control unit detects an information input by the input image when it is determined that an input operation with a user's foot is performed around the projected input screen.

  In the information input device, it is preferable that the control unit outputs an operation signal corresponding to the information input by the input image to an external device.

  In the information input device described above, the control unit preferably performs control so that an operation signal is not output to an external device when it is determined that the input operation has been performed a predetermined number of times within a predetermined time.

  In the above information input device, it is preferable that the control unit specifies an object in the detection region using detection data from the detection sensor, and detects the user's foot from the curvature of the specified object.

  In the above information input device, the input image is preferably a light spot for illuminating the dummy switch.

  In the information input device, it is possible to project an input image so as to detect the user's foot and track the user's foot, and to input information to the input image based on the detected motion of the user's foot. Therefore, it is possible to input information easily and easily without wearing a specific device.

It is a figure which shows the example which applied the information input device 1 to the performance of a musical instrument. 1 is a perspective view showing an appearance of an irradiation detection device 10. FIG. 1 is a block diagram showing a schematic configuration of an information input device 1. FIG. It is a figure which shows an example of the control flow for an initial setting. It is a figure which shows an example of the image which the RGB imaging part 21 imaged. 4 is a diagram for explaining depth data in a detection region 80. FIG. (A)-(c) is a figure which shows the example of the image for an input which the irradiation part 30 projects. It is a figure which shows an example of the control flow in the information input device. It is an example of an image based on the RGB data which the control apparatus 50 acquired by S21. It is a figure for demonstrating the tracking of the image for input 70. FIG. It is a figure for demonstrating the tap of the front-end | tip position of shoes. It is a figure which shows the other example of the input by a leg | foot. It is a figure which shows the other example of the control flow in the information input device. It is a figure (1) for demonstrating the control flow shown in FIG. It is a figure (2) for demonstrating the control flow shown in FIG.

  The information input device will be described below with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted. For the sake of explanation, the scale of the members is changed as appropriate.

  FIG. 1 is a diagram illustrating an example in which the information input device 1 is applied to playing a musical instrument.

  The information input device 1 includes an irradiation detection device 10 and a control device 50. The musical instrument 60 played by the user is connected to the control device 50 by a chord 66. A musical tone signal from the musical instrument 60 (for example, an electric guitar or an electric acoustic guitar) is given a predetermined effect by the control device 50, is input to the amplifier 61 as a corrected musical tone signal, and is output from the speaker 62 connected to the amplifier 61. Is done.

  The irradiation detection device 10 is disposed below the music stand 65, and the irradiation detection device 10 is connected to the control device 50 by a cable 67. The irradiation detection device 10 projects an effector image 81 in a detection region 80 where detection is performed on a stage, floor, ground, or the like. When the user taps (up and down) the tip position of the shoe so as to actually use the effector at the projected portion of the effector image 81 projected, the irradiation detection device 10 detects it, and the control device 50 detects the instrument 60. The same effect as that of the effector is applied to the musical tone signal from the output signal to the amplifier 61.

  As described above, in the example shown in FIG. 1, although not actually present, the effect signal 81 projected on the tip position of the user's shoe is used to convert the musical sound signal from the instrument 60 into the same manner as the actual effector. It is possible to give effects.

  FIG. 2 is a perspective view showing the appearance of the irradiation detection device 10, and FIG. 3 is a block diagram showing a schematic configuration of the information input device 1.

  The irradiation detection device 10 includes a detection unit 20, an irradiation unit 30, a pan head 40, and the like, is fixed to a music stand 65, and is covered with a dome-shaped cover 11 made of a transparent plastic material. Yes.

  The detection unit 20 includes an RGB imaging unit 21, an infrared camera 22, an infrared irradiation light emitting unit 23, and the like. The RGB imaging unit 21 captures an image in the detection area, and outputs RGB data and position coordinate data for each pixel of the captured image. The infrared camera 22 receives reflected light reflected by an infrared ray irradiated from the infrared irradiation light emitting unit 23 from an object existing in the detection region 80, and depth data for each pixel of the captured image (infrared camera 22 and pixel (Data corresponding to the distance between). Note that the RGB imaging unit 21 and the infrared camera 22 are set to have the same resolution in the same detection area 80.

  The irradiation unit 30 is composed of an ultra-compact projector using RGB light emitting lasers, and is attached to the second rotating unit 43 of the pan head 40. In accordance with the image data received from the control device 50, the irradiation unit 30 projects the input image 70 including the input image onto the detection area 80 (stage, floor, ground, etc.). If a predetermined input image 70 can be projected, an irradiation unit other than a micro projector using RGB light emitting lasers can be used.

  The pan head 40 includes a base 41, a first rotating part 42 that rotates in the θ direction by a first motor 45, a second rotating part 43 that rotates in the φ direction by a second motor 46, and the like.

  The control device 50 is an I / O for transmitting / receiving data to / from the CPU 51, the RAM 52, the ROM 53, the detection unit 20, the irradiation unit 30, the pan head 40, and the performance device (for example, the musical instrument 60 and the amplifier 61). O54, the effect provision part 55 grade | etc., Are comprised. In the example shown in FIG. 1, the control device 50 detects that the user has tapped the input image 70 projected in the detection region 80 at the tip position of the shoe, and the musical tone signal from the instrument 60 is detected. Then, a modified tone signal with a predetermined effect is output to the amplifier 61.

  The control device 50 is configured to control the first motor 45 and the second motor 46 based on the control data so as to project the input image 70 at a desired position on the detection region 80. Note that the control device 50 may have another recording medium such as an HD. When the control device 50 controls the first motor 45 to rotate the first rotating unit 42 in the θ direction, the input image 70 moves in the direction of arrow A. Further, when the control device 50 controls the second motor 46 to rotate the second rotating unit 43 in the φ direction, the input image 70 moves in the direction of the arrow B.

  A signal line for exchanging RGB data, position coordinate data, depth data, image data, and control data shown in FIG. 3 between the irradiation detection device 10 and the control device 50 is built in the cable 67. Note that data transmission / reception between the irradiation detection apparatus 10 and the control unit 50 may be performed wirelessly.

  FIG. 4 is a diagram illustrating an example of a control flow for initial setting.

  The control flow shown in FIG. 4 is executed by the CPU 51 of the control device 50 controlling the detection unit 20, the irradiation unit 30, and the camera platform 40 according to a program stored in advance in the ROM 53 of the control device 50.

  The control device 50 automatically designates the position of the detection region 80 on the projection surface based on the image captured by the RGB imaging unit 21 of the detection unit 20 (S10). Position coordinate data indicating the range of the designated detection area 80 is recorded in the RAM 52 or the like. Further, the control device 50 identifies the background color (for example, color of stage, floor, ground, etc.) of the detection area 80 based on the RGB data from the detection unit 20 and records it in the RAM 52 or the like.

  FIG. 5 is a diagram illustrating an example of an image captured by the RGB imaging unit 21.

  In the example of FIG. 5, when the control device 50 designates four points C1 to C4, the detection region 80 within the range is designated. The detection area 80 needs to be set so as to include at least the position of the tip position of the shoe of the user. Therefore, the size of the range of the detection region 80 may be specified while the range of the detection region 80 from the irradiation unit 30 is shown on the floor or the like. A PC or the like may be connected to the control device 50 at the time of initial setting, and the size of the detection area 80 may be designated using the PC or the like.

  Next, the control device 50 acquires depth data from the detection unit 20 (S11), and acquires position coordinate data and depth data for each pixel for all pixels included in the detection region 80 designated as the projection surface. Then, it is recorded in the RAM 52 (S12).

  FIG. 6 is a diagram for explaining the depth data in the detection region 80.

  As shown in FIG. 6, a point D1 on the detection region 80 immediately below the detection unit 20 and a point D2 at a position away from the detection unit 20 are on the same detection region 80, but the depth from the detection unit 20 There will be a difference in the data. Therefore, the position coordinate data and the depth data are acquired and recorded in advance for all the pixels in the detection area 80.

  Next, the control device 50 transmits predetermined image data to the irradiation unit 30 to project the reference projection image 71 on the detection area 80, and transmits predetermined control data to the camera platform 40 to control the camera platform 40. Then, the reference projection image 71 is moved (S13).

  The reference projection image 71 is five black dots displayed in a circular frame as shown in FIG. The reference projection image 71 shown in FIG. 5 is an example, and other images can be used. Further, the reference projection image 71-1 in FIG. 5 is the image directly below the camera platform 40 and projected onto the reference position in this example. The positional relationship between the camera platform 40 and the detection region 80, the reference position of the projection image, and the like can be determined as appropriate according to the situation.

  Next, the control device 50 acquires RGB data and position coordinate data from the detection unit 20 (S14). Further, the control device 50 specifies the position of the reference projection image 71 using five black dots, and determines the relationship between the control data transmitted to the camera platform 40 and the position coordinate data of the specified reference projection image 71. It records in the data table comprised on RAM52 (S15).

  The control device 50 repeatedly performs the above-described S13 to S15 so as to cover the entire detection region 80 while moving the reference projection image 71 at predetermined time intervals (S16). In FIG. 5, the reference projection images 71-2 to 71-7 are shown. However, the above is an example, and the amount of movement for moving the reference projection image in order to specify the position can be appropriately determined. it can.

  The control device 50 repeats S13 to S16 a predetermined number of times to complete a data table representing the correspondence relationship between the position coordinate data of the reference projection image 71 and the control data for all the areas of the detection area 80 (S17). End the operation.

  The control device 50 can move the input image 70 by controlling the camera platform 40 to an arbitrary position on the designated detection area 80 by using the data table completed in S17. Conversely, the control device 50 can also specify the position of the currently projected input image 70 on the detection area 80 by using the data table.

  FIG. 7 is a diagram illustrating an example of an input image projected by the irradiation unit 30.

  The input image 70 shown in FIG. 7A includes a pedal-type effector image 81. In the pedal portion surrounded by the dotted line 71, when the tip position of the user's shoes is tapped (moved up and down), the control device 50 determines that an input operation similar to that when the pedal is depressed is performed.

  The input image 70 ′ shown in FIG. 7B includes a push switch type effector image 81 ′. When the tip position of the shoe of the user is tapped in the push switch portion surrounded by the dotted line 72, the control device 50 determines that the same input operation as that performed when the push switch is stepped on has been performed.

  The input image 70 ″ shown in FIG. 7C includes a multi-type effector image 81 ″. When the tip position of the user's shoes is tapped in the switch portion surrounded by the dotted lines 73 to 76 and the pedal portion surrounded by the dotted line 77, the control device 50 inputs the same as when each switch or pedal is stepped on. It is determined that the operation has been performed.

  The input images shown in FIGS. 7A to 7C are examples, and the irradiation unit 30 can project various types of input images based on the image data from the control device 50. Is possible.

  The control device 50 can determine the type of the input button included in the input image and the arrangement position in the input image based on the image data transmitted to the irradiation unit 30. Further, the control device 50 can specify the position of the input image in the detection area 80 based on the control data transmitted to the camera platform 40 and the data table created in S17 of FIG. Therefore, the control device can specify the position of each input button in the detection area 80 based on the image data transmitted to the irradiation unit 30 and the control data transmitted to the camera platform 40.

  FIG. 8 is a diagram illustrating an example of a control flow in the information input device 1.

  The control flow shown in FIG. 8 is executed by the CPU 51 of the control device 50 controlling the detection unit 20, the irradiation unit 30, and the camera platform 40 according to a program stored in advance in the ROM 53 of the control device 50. The control flow shown in FIG. 8 is repeatedly executed at predetermined time intervals (for example, every 100 ms).

  First, the control device 50 acquires the image data transmitted to the irradiation unit 30 and the control data transmitted to the camera platform 40 (S20). Next, the control device 50 acquires RGB data, position coordinate data, and depth data from the detection unit 20 (S21). Note that the order of S20 and S21 may be reversed.

  Next, the control device 50 specifies the tip position of the shoe based on the RGB data and the position coordinate data acquired in S21, and acquires the depth data of the specified tip position of the shoe based on the depth data acquired in S21. (S22).

  FIG. 9 is an image example based on the RGB data acquired by the control device 50 in S21.

  In FIG. 9, in the detection area 80, a tripod portion of the music stand 65, a part of the user's right foot 68, a part of the user's left foot 69, and a part of the cord 66 that connects the musical instrument 60 and the control device 50. It is reflected. The control device 50 compares the background color of the detection area 80 stored in advance (see S10 in FIG. 4) with the RGB data acquired in S21 to group a portion different from the background color and identify it as an object. To do. For example, in the example of FIG. 9, four objects, which are a tripod portion of the music stand 65, a part of the user's right foot 68, a part of the user's left foot 69, and a part of the cord 66 that connects the musical instrument 60 and the control device 50. Identify.

  Next, the control apparatus 50 specifies the endmost part of each object based on a known identification method. In the example of FIG. 9, the points P1, P4, P7, P10, and P13 correspond to the five points. Next, two points that are separated from each other by a predetermined distance on the periphery of the same object are specified from the specified endmost part. For example, regarding the point P1, the point P2 and the point P3 correspond, and the other four endmost points are similarly specified.

  Next, for each object, the control device 50 calculates the curvature at the end of the object based on a known calculation direction from a total of three points including the endmost point and the two left and right points. For example, the curvature is obtained from the points P1, P2, and P3. Usually, an object at the foot with a small curvature at the end is the end of the shoe, so it is possible to identify whether the object is the end of the shoe by setting a predetermined threshold. Is possible. In the example of FIG. 9, based on the above identification method, the point P4 is specified as the tip position of the shoe with respect to the user's right foot 68, and the point P1 is specified as the tip position of the shoe with respect to the user's left foot 69. Note that the music stand 65 and the cord 66 are not specified as the tip position of the shoe.

  Next, the control device 50 acquires the depth data of the points P1 and P4 specified as the tip position of the shoe together, and stores the position coordinate data and the depth data of the tip position of the shoe as a set and stores them in the RAM 52 or the like ( S23).

  Next, the control device 50 controls the irradiation unit 30 to move and display the input image 70 so as to track the shoe tip position based on the position coordinate data of the shoe tip position specified in S23. (S24).

  FIG. 10 is a diagram for explaining the tracking of the input image 70.

  At that time, when the user's right foot 68a moves in the direction of the arrow E to the position of the right foot 68b, the control device 50 moves the input image 70a in the direction of the arrow F accordingly. The irradiation unit 30 is controlled so as to become the input image 70b. In the example of FIG. 10, the input image 70 is the image 81 of the heald effector shown in FIG. 7A, and is controlled so that the pedal portion is projected corresponding to the tip position P4 of the shoe. ing.

  Next, the control device 50 determines whether or not an input operation has been performed (S25). Whether or not an input operation has been performed is determined based on whether or not the tip position of the shoe has been tapped (with the heel as an axis).

  FIG. 11 is a diagram for explaining a tap at a tip position of a shoe.

  When the position coordinate data of the previous shoe tip position stored in S23 is substantially the same as the position coordinate data of the shoe tip position specified in S22 this time, the control device 50 stores the previous shoe stored in S23. The distance (or difference) between the depth data of the tip position of the shoe and the depth data of the tip position of the shoe specified in S22 this time is calculated. When the distance is equal to or greater than a predetermined threshold (for example, 5 cm), the control device 50 determines that the tip position of the shoe has been tapped, that is, an input operation has been performed.

  In the example of FIG. 11, when the tip position P4 of the user's right foot 68a is moved by the distance S to the tip position P4 ′ of the right foot 68c, if the distance S is greater than the threshold value, it is determined that an input operation has been performed. Is done. In addition, said determination method is an example which determines whether input operation was performed with the user's foot, Comprising: It is not limited to this.

  When it is determined in S25 that there is an input operation, the control device 50 determines the position of the input button included in the input image 70 in the detection area 80 based on the image data acquired in S20 and the control data changed in S24. Is specified (S26).

  Next, the control device 50 selects an input button (a pedal portion surrounded by a dotted line 71 in FIG. 7A) included in the input image 70 corresponding to the tip position of the shoe determined to have been input in S25. Specify (S27). Next, the control device 50 executes a process corresponding to the input button for which the input operation has been performed (S28), and ends the series of processes. Similarly, when it is determined in S25 that the input operation has not been performed, the series of processes is terminated. In the system of FIG. 1, the processing corresponding to the input operation corresponds to performing a correction process for adding a predetermined effect to the musical sound signal from the musical instrument 60 by the effect applying unit 55 of the control device 50.

  That is, when an effector that changes the tone from the electric guitar is displayed as the input image 70 (see FIG. 7A), the user can move the tip position of the shoe up and down anywhere in the detection area 80. It is possible to obtain the same effect as operating the effector.

  In the information input device 1 described above, the tip position of the user's shoes is specified, the input image 70 is projected so as to track the tip position of the user's shoes, and the tap of the tip position of the user's shoes is detected. Judged as an input operation. Therefore, a user playing a musical instrument can perform a desired input operation simply by tapping the tip of the shoe at a desired position, and does not need to search for the position of the effector during the performance. Further, since the input image 70 can be designed freely, a desired input operation can be easily performed (see FIGS. 7A to 7C).

  In the above example, the function of processing the musical tone signal from the musical instrument is operated with the foot, but the information input device according to the present invention is not limited to the above operation. For example, the information input device according to the present invention can be applied to an input operation or the like for performing a network connection in a state where a hand is closed.

  In the above example, the tip position of the user's shoes is detected, and it is determined whether or not an input operation has been performed according to the operation of the tip position of the user's shoes. However, the position of the user's foot to be detected may be not only the tip position of the shoe, but also the shoe heel, the shape of the entire shoe, the knee or the ankle portion, etc., and is not limited to the tip position of the shoe.

  In the above example, it is detected that the difference (distance) between the depth data of the tip position of the user's shoes and the depth data of the detection area has moved up and down beyond a predetermined threshold, and the user's foot has been tapped Judgment was made. However, the input operation using the user's feet is not only the movement of the tip position of the shoe from above to below or from below to above, with reference to the stage, floor, ground, etc. of the detection region 80, for example, shoes It may be determined that tapping has been made for the first time when the position of the tip moves from up to down to up. Further, it may be determined that the tapping has been performed in accordance with the speed or change amount of the tip position of the shoe.

  In the above example, the input image is projected so as to track the tip position of the shoe. However, when the input image is always projected so as to track the tip position of the shoe, it may be difficult to tap, so the input image is not displayed until the tip position of the shoe moves more than a predetermined distance. You may control so that the front-end | tip position of shoes may be tracked.

  In the above example, when a tap based on the tip position of the shoe is detected, an operation signal corresponding to an input operation by the tap is output to an external device (for example, the amplifier 61) of the control device 50. However, if all of the subtle vertical movements of the tip position of the foot are detected, a chattering-like situation occurs. Therefore, a tap is detected more than once (three times) within a predetermined time (for example, 1 s). In this case, it may be determined that there is no operation input.

  FIG. 12 is a diagram illustrating another example of input by feet.

  FIG. 12 is an example of an image based on the RGB data acquired by the control device 50 in S21 as in FIG. In FIG. 12, the dummy switch 90 is detected in the detection area 80. The dummy switch 90 is a mere switch for the user to obtain a click feeling with his / her foot, but does not connect with other devices and exchange information.

  In the control flow shown in FIG. 8, the tip position of the shoe is detected in real time, and the input image 70 is moved and displayed so as to track it. However, in the example illustrated in FIG. 12, the control unit 50 detects the dummy switch 90, and the input operation is performed when the tip position of the shoe is tapped at the center portion P <b> 20 that is the switch position of the dummy switch 90. judge. Information on the shape of the dummy switch 90 and information on the switch position are recorded in advance in the ROM 53 of the control device 50. The control device 50 detects the dummy switch 90 in S22 in the control flow of FIG. Part P20 can be specified.

  The detection of the dummy switch 90 may be performed only once at the first time (usually, once the switch is placed, it is less necessary to move the dummy switch thereafter), or it is repeatedly performed at a predetermined time interval (user May move the dummy switch with the foot).

  Further, when the dummy switch 90 as shown in FIG. 12 is used, it is not necessary to project the input image 70, but the light spot 91 is detected so that the user can easily confirm the location. You may make it project on the place where the dummy switch 90 exists. Furthermore, when there are a plurality of dummy switches in the detection area 80, the external shape of the light spot that illuminates the dummy switches is changed according to the dummy spots (circle, square, triangle, etc.) in order to identify the dummy switches from each other. May be. Further, different numbers, marks, predetermined explanation information, etc. may be projected in the vicinity of each dummy switch.

  FIG. 13 is a diagram showing another example of the control flow in the information input device 1, and FIGS. 14 and 15 are diagrams for explaining the control flow shown in FIG.

  The control flow shown in FIG. 13 is executed by the CPU 51 of the control device 50 controlling the detection unit 20, the irradiation unit 30, and the camera platform 40 in accordance with a program stored in advance in the ROM 53 of the control device 50. The control flow shown in FIG. 13 is repeatedly executed at predetermined time intervals (for example, every 100 ms). Also, in the control flow shown in FIG. 13, S30 to S33 are the same as S20 to S23 shown in FIG.

  Next, the control device 50 determines whether or not the tip position of the shoe has been double-tapped (S34). Whether or not a double tap has been made is determined by the “tap at the tip position of the shoe” (see FIG. 11) considered when determining whether or not an operation input has been made in S25 of FIG. Or less) depending on whether or not it was performed twice.

  When it is determined in S34 that there is a double tap, the control device 50 controls the irradiation unit 30, and based on the position coordinate data of the shoe tip position identified in S33, the input image 100 is the shoe tip position. Is displayed immediately above (S35).

  FIG. 14 shows a state where the input image 100 is displayed immediately above the right foot 68 when a double tap is performed while the tip position P4 of the user's right foot 68 is recognized. Note that the input image 100 illustrated in FIG. 14 is an example, and the present invention is not limited thereto, and other input images can be used.

  The input image 100 includes an indicator unit 110 and four icons 111 to 114, and predetermined processing content is assigned to each icon in advance. Furthermore, areas 1 to 4 including the area where the four icons of the input image 100 are displayed are extended to the outside around the input image 100 (see FIGS. 14 and 15). It is assumed that the positional relationship between the input image 100 and the areas 1 to 4 is determined in advance. Further, for example, “input that gives a predetermined effect to the musical tone signal from the musical instrument 60 by the effect applying unit 55 of the control device 50” is assigned to the icon 112, and “end operation” is assigned to the icon 114. It shall be.

  Next, the control device 50 determines whether or not an input operation has been performed (S36). Determination of whether or not an input operation has been performed is the same as S25 in FIG.

  When it is determined in S36 that an input operation has been performed, the control device 50 applies the position data of the input image 100 displayed in S35, the display data of the input image 100 itself acquired in S30, and the input image 100. Based on the position data of the area associated with the included icon, the range of areas 1 to 4 in the detection area 80 is specified (S37).

  Next, the control device 50 specifies an area corresponding to the tip position of the shoe determined to have been input in S25, specifies an icon corresponding to the area, and specifies information input content corresponding to the icon ( S38). Further, the control device 50 displays the specified icon in the indicator 110 of the input image 100.

  FIG. 15 illustrates an example of a state in which it is determined that an operation input has been performed. In the case of FIG. 15, since the tip position P4 of the shoe when it is determined that the input operation has been performed is within the region 2, it is recognized that the input operation has been performed on the icon 112, and the icon 112 is displayed on the indicator 110. ing.

  Next, the control device 50 determines whether or not the information input content specified in S38 is “end operation” (S39). If it is not “end operation”, the processing corresponding to the input operation icon is performed. Is executed (S40).

  If it is determined in S39 that the information input content specified in S38 is an “end operation” in S39, the control device 50 deletes the input image 100 (S41) and ends the series of processes. As described above, when the area specified in S38 is the area 4 (icon 114), it is determined to be “end processing”.

  In the control flow shown in FIG. 8, it is necessary to perform an input operation at the position of the input button of the input image as shown in FIGS. On the other hand, in the control flow shown in FIG. 13, as shown in FIG. 15, if an input operation is performed in an area corresponding to each icon of the input image 100, processing assigned in advance to the corresponding icon is performed. Such information input can be performed. Therefore, in the control flow shown in FIG. 13, it is only necessary to tap within a predetermined area around the input image without tapping the input button itself of the input image. Shorter and easier input operation.

  In the above example, as shown in FIG. 15, the areas 1 to 4 corresponding to the icons 111 to 114 included in the input image 100 are extended radially outward from the icons around the input image 100. It was. However, the above example is an example, and other methods may be used as long as it can be easily recognized as an area corresponding to an icon. For example, the icons may be arranged and displayed in a line, and the area corresponding to each icon may be extended to just below each icon.

  In the above example, when the user double taps the shoe tip with the heel as an axis (see S34 in FIG. 13), the input image 100 is displayed so as to track the tip position of the shoe. However, the input image 100 may be displayed first by another method. For example, a single tap may be used similarly to the input operation. In addition, the input image 100 is displayed at the home position (see H in FIG. 14) from the beginning, and the input image 100 is controlled to be moved so as to track the tip position of the shoe to the double-tapped position. May be. In this case, it is more preferable to perform control so that the input image 100 is not deleted but returned to the home position in accordance with the end operation (see S41 in FIG. 13). Furthermore, the input image 100 at the home position does not have to have the same shape and size as when the input operation is actually performed. For example, the input image 100 may be displayed in a reduced size.

  In the above example, when the user double taps the shoe tip with the heel as an axis (see S34 in FIG. 13), the input image 100 is displayed so as to track the tip position of the shoe. However, even after displaying the input image 100 once, if the user continues to acquire the position coordinates of the tip position of the shoe, and the user double-tap again, so as to track the tip position of the shoe that has been double-tapped again, The input image 100 may be moved.

DESCRIPTION OF SYMBOLS 1 Information input device 20 Detection part 21 RGB imaging part 22 Infrared camera 23 Infrared irradiation light emission part 30 Irradiation part 40 Pan head 45 1st motor 46 2nd motor 50 Control apparatus 51 CPU
52 RAM
53 ROM
54 I / O
70, 70 ', 70 ", 100 Input image 90 Dummy switch

Claims (9)

A projection unit that projects an input image;
A projection position changing unit for changing the projection position of the input image;
A detection sensor for detecting the position of the user's foot;
The projection position changing unit is controlled so that the input image tracks the position of the user's foot detected by the detection sensor, and an input operation by the user's foot is determined, and information input by the input image A control unit for detecting
An information input device comprising: The detection sensor includes a depth sensor;
The control unit calculates a distance from the projection surface onto which the input image is projected to the user's foot based on depth data from the depth sensor, and an input operation by the user's foot based on the calculated distance The information input device according to claim 1, wherein:   The information input device according to claim 2, wherein the control unit detects a tap by a user's foot based on the distance and determines whether or not an input operation has been performed.   The control unit detects information input by the input image when it is determined that an input operation by a user's foot is performed on the projected input screen. The information input device according to item.   The control unit according to any one of claims 1 to 3, wherein the control unit detects information input by the input image when it is determined that an input operation by a user's foot is performed around the projected input screen. The information input device according to one item.   The information input device according to claim 1, wherein the control unit outputs an operation signal corresponding to information input by the input image to an external device.   The information input device according to claim 6, wherein when it is determined that the input operation has been performed a predetermined number of times within a predetermined time, the control unit performs control so that the operation signal is not output to an external device.   The said control part specifies the object in a detection area | region using the detection data from the said detection sensor, and detects a user's leg | foot from the curvature of the specified object, The any one of Claims 1-7. The information input device described in 1.   The information input device according to claim 1, wherein the input image is a light spot for illuminating a dummy switch.

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